Add API Guide and Tests made with Spring RestDocs for rp-server

[kj84park]

In the case of the server app(FIDO2 Server), the API Guide of Spring RestDocs has already been completed.

However, it does not exist for rpserver yet. The API Guide can be configured by referring to the following.

references

• Official Spring RestDocs Guide
• https://github.com/line/line-fido2-server/pull/10

Configuration

• Api-guide.adoc
• Tests
  • Dummy data for tests
• Build settings
• Api-guide.html

  How to open

• Readme

[simple]

I'd like to work on this. :)

[kj84park]

I'd like to work on this. :)

Sure! Thank you for your contribution!